新增：代码溯源需提前获取服务器是否在维护

app/controllers/traces/base_controller.rb

@@ -1,7 +1,7 @@
 class Traces::BaseController < ApplicationController
 
   helper_method :observed_logged_user?, :observed_user
-
+  before_action :check_trace_system
 
   def observed_user
     @_observed_user ||= (User.find_by_login(params[:user_id]) || User.find_by_id(params[:user_id]))
@@ -15,4 +15,12 @@ class Traces::BaseController < ApplicationController
   def check_auth 
     return render_forbidden unless current_user.admin? || observed_logged_user?
   end
+
+  def check_trace_system
+    code, data, error = Trace::SystemInfoService.call(current_user.trace_token)
+    return render_ok({status: 501, data: {operate_time: data['operate_time']}, message: '系统维护中'}) if data['status'] === 0
+  rescue 
+    # 这里根据需求跳转到404
+    return render_not_found
+  end
 end